Carbureter.



B. N. PIERCE.

I-VITNESSES: v INVENTOR.

'AW BUTT Neulon Pierce.

v ,we

A TTORNEY.

B. N. PIERCE.

GARBURETER.

APPLICATION FILED JANS, 1910. v 1,005,300. Patented 0013.101911.

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WM eM/. BUTT Neulcm Bevce.

ururrnv STATES PAT-ENT oFFIeE,

' -BURT NEULoN PIERCE, oF-iNDIANAPoL1s,gIND1ANA.

To all whom it may concern:

Be it 'known that I, BURT NEULON PIERCE, of 'lndi'anapoli`s, county of Marion, and State lof Indiana, have invented a certain new'and useful Carbureter; and I do hereby declarefthatV the following isa full, clear,

and exact description thereof, referencebeing had-'to the accompanying drawings, lin which like letters refer to like parts.`

The object of this invention is to improve the construction of carbureters, and the in# vention is particularly an improvement on the construction of carbureter shown and described in my former application for Letters Patent, Serial No. 393,627, filed Sept. 19,'

One feature' of the invention consists in the location ofthe wing valve regulating. the movement ofy airl through the carbureter from t-hehmain air inlet, particularly with reference to 'the fuel` inlet` and a secondary air inlet' near thefuel inlet. The arrangementis such that said wing. valve will causeV tlie air entering from the main air inlet at Ya low speed. to pass immediately over the fuel inlet and the secondary air inlet, so that said air current will stimulate the movenient of fuel and also of air through the secondary air inlet and thus get an ample fuel. supply and an ample air supply, and a satisfactory admixture of the two. To that end 'the secondary air inlet is immediately' behind and on a lower level than the fuel inlet, so that the air passing from the main inlet under said wing valve, will tend to draw'up air through the secondary inlet and never force the air out through said inlet.' lVhen the current'of air fromthe main air inlet is relatively'great, it Will automatically actuate said wing valve, so that the air, or much of it, will pass above the wing'valve and not sweep over the fuel inlet and secondaryinlet. rlhere is also a 'semi-circular seat for the upper part of the wing valve eccentrical with the body of the carbureter so" asy to edectually close "the passageway Specification of Letters Patent.

Patented oet. 10,1911.

Application led January 3, 1910. Serial No. 536,200.

l lsupply valves are replaced for any reason Vor substituted, the relative posit-ion` of the fuel valve with the float will be alWays'th'e'sa-'m'e and fixed andl there will be no chance for error, and it is very important that the float always be maintained by said valve in' the same position when the valve is seated. The end of the valve is connected with a screw bolt having a head or shoulder which when screwed into the arm from` the float lserves as a positive stop when the shoulder or head meets the arm from the float. Also said screw bolt and fuel supply valve and the stem are constructed s o as togbe'permainently united and' yet be fiexible and this is Iof value in handling the valve or screw bolt, 4as they are very small and such connection always maintains a positive relationship beitween the screw bolt and the valve. This is Vaccomplished by lforming the integral' ball on the upper end of the valve stem that eX tends into the socket of the bolt, and clamping the aws of said socket around said ball sufficiently to hold the ball in the socket and yet permit vibration on the valve stem as if it were a universal joint.

Another feature consists in novel meansfor starting the engine. A cup-like chamber is provided at the lower part of the bowl. and an air tube therethrough in position tovcatch' the drippings or overflow of fuel'and also to be filled when the flushing mechanism is` operated. This cup-like chamber is open 'to the outer air, said openings being above'the lower extension of the inlet, sov that there will always be an air chamber in said receptacle with fluid therein, but the liuid' will rise slightly above the inlet before it will floisY out through the openings into said receptacle. This maintains the fluid in posiltion to be sucked or drawn up immediately for starting the automobile and whenever the demand by the engine is so great as to draw air through the passageway i' n vthe lower end bf which said receptacleV is secured, the air will 'be somewhatlad'en with fuel as it passes through said receptacle.

rlhe nature of the invention will be understood from the accompanying drawings and the' following description. and claims.`

ln the drawings Figure 1 is a central vertical section through the carbureter with the actuated position of the wing and throttle valves shown in dotted' lines. Fig. 2 is a 'perv apart thereof. in' section on the line 2-2 of Fig. 1. Fig. 3 isa section through'the .A lower portion of Fig. 2, which cuts longitudinally through the fuel passageway. Fig. 5 4 is a vertical section on the 'Fig'. 1. e

A In vdetail there isa bowl 10 containing gasolene 11, and a oat 12 securedr to. an

arm 13,fulcrumed at 14 to the fuel-supply receive the mixing chamber 16, which is substantially a U-shaped tube with-a central downward extension 17 that projects through an upwardly extending collar 18 in 15 the central bottom part of the float chamber or bowl. The lower part' of the extension 17 is externally' threaded to receive the receptacle 19, whereby the bowl and mixing chamber are secured together.

lThe 'mixingchamber has a main air inlet attachment 20 with a main air inlet 21, in-

dicated byl dotted lines, and with an attachv i -lower level than the fuel inlet 25. This fuel inlet is at the upper end of the fuel passageway 26 and leads downthrou h the enlarged portion of the extension 1 tothe fioat chamber, as shown inl Fig. 3. The partin which the fuel passageway 26 is located is builtupon a higher level than. the part or pointwhere the secondary' air inlet 24 is located. This is to cause the current of air coming in from the main .air inlet 21 to l sweep over the fuel inlet 25 and secondary inlet 24 and draw up air through said secondary air inletand not blow said secondary air inlet. To cause the current of air coming in from the main -air inlet 21 at low speeds to pass entirely over the fuel inlet25 and air inlet 24, lthe mixing chamber is temporarily dividedby a wing valve 30 'mounted on the valve stem 31 that extends horizontally through the casing of the mixing chamber and is mounted therein so as to turn under the inuence of the current of air againstrsaid wing valve, when said current -becomes strong. The air is enabled to operate said valve by reason of the valve being cut away on its underside so that the major portion thereof is above the valve stem 31. The lower portion of the valve is cut away so as to havealmost a semi-cir- 65 cular recess and vwhen there is a slow curout through line 7--7 of" attachment'l. The 'bowl is cup-shaped to' rent of air coming in through the inlet 21 all of it is enabled to pass through said recess and sweep over the inlets 24 and 25 and take up fuel and additional air therethrough.' But when the suction of theengine becomes very great, it will draw more air and thus increase the current through the main` air inlet 21 enough to turn the up er part of the valve to the dotted line position y -in Fig. 1. This action of chewing valve 75 is resisted by a spring 32 that extends from the external arm 33 on'the outer end of the valve stein 31. against the collar 34 on a screw 35 that extends through the top 36 that extends laterally through 'the upper 80 lpart of the mixing chamber casing and also through the ange 37 Thetension of the spring can be adjusted by said screw 35. Said spring tends to hold the upper portion of the Vwing valve tightly againstV the fiat' 85` faced rib 37 that is located on the inner upper wall' of the mixing chamber near the middle thereof and extends about halfway around the mixing chamber transversely so as t'o be substantially semi-circular. '90

The fuel inlet 25 is controlled by the needle valve4 40. that extends' through the top 36 of the mixing chamber casing angularly through the mixing chamber to the fuel inlet. Theupper part of said valve is threaded and thevupper end provided with a head.41, whereby said valve may be adjusted,'and a spring 140 on the valve tends to hold it' from rotation. The usual throttlev valve 42 is located inthe exit end of the mixing chamber and has a lever 43.

57 is a fuel supply pipe and 68 is a cap at theupper end of the' fuelsupply attachment 15` v y. The flushing lever 60 is connected with suitable means for actuating it and is mounted between its ends on the verticalv arm 61, 4 l;

see Fig. 7, and is pivoted to the upper end of a flushing rod 62 that extends down into the bowl and depressesvthe float 12. The 110.?1'"

Springs` 64 tend to return the rod 62 to its upper'and normal position. The receptacle 19 at the'lower end of the air passageway 17 is peculiarly formed, as shown in Figs. 1 and7. It is somewhat elongated .so as to have the .openings 65 to the outside air sufciently above the bottom to leave a chamber in which gasolene may accumulate. lThe openings 6 5, however, are above the lower end of the tube 17 slightly, so that there is an air chamberin the uppenp'art ofthe receptacle 19 that is neverv filled with gasolene.

The gasolene accumulates in said receptacle until it overiows through the opening 65,. andthen it will stand slightly above the lower end of the tube 17. whereby an indraft or suction of air for starting purposes, or when there is a great demand by the engine,

will cause the air to sweep in through the opening under thelower end of the tube 130 will-gil- 17 and become charged with gasolene sufficiently to form a combustible gas, and thence it goes directly to the engine.

The gas accumulates in the receptacle, 19 from all accidental overflow or condensation and from operation of the flushing rod 62. Hence this receptacle 19 is used for starting the engine and to that end the flushing rod is actuated until the receptacle 19 is filled,

and then the air drawn through said receptacle by the engine will furnish a rich charge of combustible gas.

What I claim as my invention and desire to secure by Letters Patent is:

l. A carbureter includinga mixing chainber with a main air inletl at one end and a gas outlet at, the other end, a spring-held wing valve in and extending transversely of said mixing chamber withthe lower part thereof cut away to form a normal passageway thereunder for a current of air from the main air inlet, a fuel inlet entering the mixing chamber at the bottom thereof immediately behind the said wing valve, and a secondary airinlet in the bottom of said mixing chamber' that is located immediately Vbehind said fuel inlet.

2. A carbureter including a mixing chamber with a main ai'r inlet at one end and a gas outlet at the other end, a spring-held wing valve in and extending transversely of said mixing chamber with the lower part thereof cut away to form a normal passageway thereunder for a current of air' from the main air inlet, a fuel inlet entering the mixing chamber at the bottom thereof immediately behind said wing valve, and a secondary air inlet in the bottom of said mixing chamber that is located immediately behind and on a lower level than the fuel inlet., substantially as set forth.

3. A carbureter including a mixing chamber with a main air inlet at one end and a gas outlet at the other end, a spring-held wing valve in and extending transversely of said mixing chamber with the lower partthereof cut away to form a normal passageway thereunder for a current of air from the main air inlet, a fuel inlet entering the mixing chamber at the bottom thereof immediately behind said wing'va-lve, a secondary air inlet in the bottom of said mixing chamber that is located immediately behind and on a lower level than the fuel inlet, andV a fiat semicircular rib at the inner upper sur- Aface of the mixing chamber casing to serve as av seat and stop for the upper portion of said wing valve.

4.-. A carbureter including a mixing chamber with a main air inlet at one end and a. gas outlet at the other end, a spring-held wing-valve in and extending transversely of saidmixing chamber with the lower part thereof cut away to form a normal passageway thereunder for a current of air from the main air inlet, a fuel inlet entering the mixing chamber at the bottom thereof immediately behind said wing valve, a secondary air inlet in the bottom of said mixing chamber that is located immediately behind said fuel inlet, and a needle valve extending.

through t-he top of the casing of the mixing chamber down slantingly through the mixing chamber to the fuel inlet.

5. A carbureter including a fioat chamber with a central opening surrounded by 'an upwardly extending collar, a mixing chamber casing closing the top of the float chamber and with a downward extension therefrom through the opening in the float chamber which extension is externally threaded at its lower end and is provided with a relatively large air passageway therethrough terminating in a relatively small seemidarv air inlet at its upper end into the mixing chamber, a. nut adapted to screw in the lower part of said extension for securing the fioat chamber and lmixing chamber casing together, a fuel passageway through the. wall of said downward extension that. leads from the float chamber to a vpoint immediately in front of said secondary air inlet. a needle valve for closing said fuel inlet. a wing valve mounted in the mixing chamber at a point immediately in front of said fuel inlet. a seat or stop in the upper part of said valve. a spring for holding said valve in a seated position. a main air inlet at one end of said mixing chamber, and a throttle valve at the other end thereof.

In witness wherof, l have hereunto aiiixed my signature in the presence of the witnesses herein named.

BURT NEULON PIERCE. 

